1812.2.3 Installation.
BC § 1812.2.3
Enlarged bases formed either by compacting concrete or driving a precast base shall be formed in or driven into granular soils. Enlarged base piles shall be constructed in the same manner as successful enlarged base test piles installed for the project. Enlarged base pile shafts extending through peat or other organic soil shall be encased in a permanent steel casing. Where a cased shaft is used, the shaft shall be adequately reinforced to resist column action or the annular space around the enlarged base pile shaft shall be filled sufficiently to re-establish lateral support by the soil. Where heave of an enlarged base pile or other deep foundation occurs, the enlarged base pile or other deep foundation, shall be replaced unless it is demonstrated that the enlarged base pile or other deep foundation is undamaged and capable of carrying twice its design load.
